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  # Copyright 2013 Cloudbase Solutions SRL
  # All Rights Reserved.
  #
  #    Licensed under the Apache License, Version 2.0 (the "License"); you may
  #    not use this file except in compliance with the License. You may obtain
  #    a copy of the License at
  #
  #         http://www.apache.org/licenses/LICENSE-2.0
  #
  #    Unless required by applicable law or agreed to in writing, software
  #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  #    License for the specific language governing permissions and limitations
  #    under the License.
  # @author: Alessandro Pilotti, Cloudbase Solutions Srl
  
  from sqlalchemy import Boolean, Column, ForeignKey, Integer, String
  
  from quantum.db.models_v2 import model_base
  
  
  class VlanAllocation(model_base.BASEV2):
      """Represents allocation state of vlan_id on physical network"""
      __tablename__ = 'hyperv_vlan_allocations'
  
      physical_network = Column(String(64), nullable=False, primary_key=True)
      vlan_id = Column(Integer, nullable=False, primary_key=True,
                       autoincrement=False)
      allocated = Column(Boolean, nullable=False)
  
      def __init__(self, physical_network, vlan_id):
          self.physical_network = physical_network
          self.vlan_id = vlan_id
          self.allocated = False
  
  
  class NetworkBinding(model_base.BASEV2):
      """Represents binding of virtual network to physical realization"""
      __tablename__ = 'hyperv_network_bindings'
  
      network_id = Column(String(36),
                          ForeignKey('networks.id', ondelete="CASCADE"),
                          primary_key=True)
      network_type = Column(String(32), nullable=False)
      physical_network = Column(String(64))
      segmentation_id = Column(Integer)
  
      def __init__(self, network_id, network_type, physical_network,
                   segmentation_id):
          self.network_id = network_id
          self.network_type = network_type
          self.physical_network = physical_network
          self.segmentation_id = segmentation_id
  